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Zoltan: erroneous behavior in PHG when not using local IDs #12729

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lkotipal opened this issue Feb 9, 2024 · 0 comments
Open

Zoltan: erroneous behavior in PHG when not using local IDs #12729

lkotipal opened this issue Feb 9, 2024 · 0 comments
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@egboman
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pkg: Zoltan type: bug The primary issue is a bug in Trilinos code or tests

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@lkotipal
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lkotipal commented Feb 9, 2024 •
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Bug Report

@egboman

Description

As per the documentation, local IDs are optional and not used by the library. However, PHG hypergraph partitioning crashes on this line when not using local IDs, apparently assuming bad allocation and failing to consider that ZOLTAN_MALLOC_LID_ARRAY returns NULL if Num_LID is zero.

Steps to Reproduce

  1. Compile Zoltan, the bug seems to be present on both master and dev branches.
  2. Run the C example simplePHG with NUM_LID_ENTRIES set to 0 on line 168.
  3. Enjoy the memory error.
@lkotipal lkotipal added the type: bug The primary issue is a bug in Trilinos code or tests label Feb 9, 2024
@lkotipal lkotipal mentioned this issue Feb 9, 2024
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@egboman egboman self-assigned this Feb 9, 2024
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pkg: Zoltan type: bug The primary issue is a bug in Trilinos code or tests
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